Valve



VALVE Filed sept. 1o. 192s 2 sheets-snee: 2

W. H. KNISKERN INVENTOR WHL TER H. /fA//s/(ERN Br mm L/Jul( ATTUHNEYS fFeb. 7, 192s.

Patented Feb. 7, 1928i.k

unirse stares PATENT OFFICE..

WALTER, n. KnrsKERN, er svn-acuse, NEW YORK, Assrenonfro Aminosirname`NITROGEN OORPORATiOn, onlsonvar, nEw YORK, A CORPORATION OE NEW YORK.,V

VALVE.

Applicationled September 141.19232 Serial No; 661,799;

My invention relates tovalves and more particularly to that type ltnovvnas high presf sure valves adapted for the control of lluids under yhighpressures and temperatures and hasforiits object to provide anovelconstrue tionandarrangement of valves of maximum simplicity andelliciency. @ther more specilic object-s will appear from thedescription hereinafter.

,lo In the accompanying drawings which illustrateexamples of ltheinvention Without defining its limits, Fig. 1 is a sectional ele*vationlof a valve lConstructed according to theinvention in aformadapted specilically Infor the control of hot fluids; Fig. 2 is asimilar v ieW looking in a direction at right angles tofFig. 1; and FBis a plan vievv.

As shown inthe drawings,- thel valve comprises a body having tWopassages 11 and `y l2between Which a valve seat 13 is located.

Either. passage 11 or-12 may be used asfthe inletand the other for theoutlet although inthe preferred form 11 is the inlet andr 12 the outlet.It vWill bemanifest from the 2a drawingsthat the valve block 10 is amassive body Within Which the passages 11 and 12 and the valve seat 13are so disposed that the strengthof the saidmassive body resistsdeformation and fracture of kall .parts of the au bodyxundery theinfluence of high pressure and prevailing thermal conditions. ln otherWordsthere is an entire absence of any thin Walls, partitions,projections, ory other` weak partslsuch as are'commonin ordinary globevalves andthe like, and the Whole-of the valve block in every partthereof is of a massive pressureeresisting character.

The valve seat 13 co-operat'es with a solid valve plug-1.a which may berigidly united or be` integral'ivith the valve stem 15 (as indie cated:in= Fig. l) butl Whichy is preferably loosely mounted upon the lower endof the valve stem 15, for Vinstance as shown in Fig. 1. The valve stem15 passes through a stun'- ing-box ltand through a suitable packing 17located in said stuing box. The stuffing box isrigidly secured to themassive body (see Figr2) kby a screw-threaded connection With a platewhich is in turn bolted to the massive body. Ait itsupper end the valvestern is externally screvvthreaded as indicated at 18for theaccommodation of an internally screivlihreaded sleeve 19. The 'latterat' its' upper end provided .viith a hand Wheel20 fixedupon thesleeve inany suitable Vvalve plug ontheone. hand andthe packing manneras bymeansoff a key 21;y and at 1 itsff-v lower endisprovided With anan`nularshoul`` der V22 adapted to engage the header 231 mounteduponft-he-upright rods 24lwhicl1arerigidly fixed upon', and extendvupwardly` 6ol fromthe massive bodylO. A yoke 25 seated? on the shoulder:25aof the valvefstem l5, in sliding engagement With thero'ds24isconnected with the valve stem 15 by means'off akey andkeyWays-.26';` in addition'toitsother 6e# functions `to beset' forthmorefully hereinrlr after, the yoke through the medium', off the keyand;y lreyWay` 26. and the rods 1 24, preventsf rotation of the valvestem15. Thev packing material 17, it- Will be observed, is'`V 70situated Within a relatively high.y thermal zone ofV the valve and ofthemassiverbody. 10, and, by. reasonv of its situation in this: Zone, is'subj ect. to ydeterioration on exposure, in the abseneefof auxiliaryycooling influences, to the heaty transmitted `frointhe hotv fluids,passing throu'ghthe valve.v rllhepaclring ma terial 17 is positioned(Figsd' and 2) Ybe-` tween anzinner Wall off the stuffing: boxf 165andanouter Wall oftheyalve stemz15 andk forms a: gas-,tight jointagainstthehigh presv sure fluids inthe valve. Y

For cooling purposes the valve stemde pros`V vided Withfan axial-bore 27int-o which a tube 28 projects,fsaid tube: being mounted; byv means 'ofaffixture 29 upon the upper end' off the valve stem landiprojectingbeyondithek same for connection With-a source ofcooling v medium such ascool.l Water, air 'ore the like:` The tube 28de ofi lessfdiameter thanthe diif- 901 ameter ofthe bore27 anditsperiphery. is,` i spacedV fromthe inner Walls of thelvalve4r stem (i. e. theivallszof; the bore 27)iii-fthey region of the packing material. The tube;V terminates atadistance from the-innerend of thejboreA 27 andthe innermost point of thebore 27, and of thetube-y 28v are both" situatedkvvithin the valvel stemat a: pointr thereof intermediatewithy krespect to" the.

susl

material. onV the ovtlier,-vvlhereby a passage isy thermal4 zone thanthat which affects the,r Uw

packing material 17. ln consequence of this arrangementv the coolingduid lirst travels in the direction of the longitudinal extent ot thepacking inaterial and then via 'the opening et the tube 28, flows in areversed direction to the outlet of the cooling fluid passage so thatthe travel ot the cooling iluid through its passage entends troni anu toa lower therinal zone than that which aleets the packing material. Forstill further increasing the cooling action the stuifiiiig bei; 1'15 maybe provided upon its exterior1 with a helical or spiral passage 32covered by means ot a shel` 38 and connected with an inlet pipe 3l andan outlet pipe 35 whereby a cooling n'iediuni i such as cool water, air,or the inte, may be circulated through the passage 32.

ln practice, to close the valve by hand the hand wheel 20, which islocated lin a relatively cool zone with respect to the valve body isrotated in the proper direction to rotatably actuate the sleeve 1S) in amanner to lower the stein 15 and with it the valve plug le. toward theseat 13; the tendency et the sleeve 19 to inove upwardly during thisactuation oit the hand wheel is overcome bythe co-operation of theannular shoulder 22 with the header To open the valve the hand wheel 2Ois rotated in the reverse dire tion. lt there is no pressure in 11 thenthe wheel 2O requires rotation until the bearing surface a thereofengages the header 23 whereupon a continued rotation of the hand wheel2O will cause an elevation of the valve stein 15 and an unseating et theplug 1a from its seat 13. lt will be understood that the sleeve 19 movesrelatively to and downwardly upon the stein 15 until the sur- 'aee a ot'the lia-nd wheel :2O engages the header 23 after which such furtherrelative downward movement of the sleeve is prevented with tlie resu tthat the stein and valve plug are raised in the manner previously setforth. rl`he valve plug is capable kof being placed most eilicientlyupon the seat 13 so as to malte an absolutelyfluid-tight contact. ln thepreferred arrangement the valve plug le is made of ehroine-vanadiuinsteel.

TWhile the valve is in use a cooling inediuin such as cool water ispassed through the stein 15 to cool the valve stein, said coolinginediuni being introduced either through tube 28, or pipe S1. rlhedrawing shows the cooling water as passing down in tube 28, thenupwardly in the space 30 and out through pipe 31. llt the saine tiiiie acooling medium, suoli as cool water, is caused to 'ilow through thepassage 32 er-teiiorly ot' the stuiling box 16 and out through the pipe35 to maintain the stuffing boi; in a ecol condition. Because of thiscooling arrangenient, not only are the moving parts cooled to permiteasy operation in opening and closng,but the tendency tostick due to theer;-

neaaefa iansion oi' the stein and st box by heat is er miv overcon'ie.further and inioorl i i a it gc is that by the action of the the theeatiy reduced, -4 utility, order io permit the ically the headI i 2 a'veto be closed cylinders 36 in `re vertically slid- "rs are connected bynieans i source or l ydraulie power, 'lees being included f lrnown way.

ie valve hydraulically, the liqthe pipes into the -ces the rains 3l'against s the latter to deive practically in- 2ist-ance. rElie valve iopened bv' the pressure withsy te f soon as the pressure the above therains 23"( in ilie cylinders 3G is released, care being tal'en, oicourse, to

sec i 'it the hand wheel 2O is lirst in suoli a noson that the aiinul i'shoulder 22 of ye 1Q is header A dal Y. 7 n, il "r iii the valve, assiiowii in tiie drawings, the iiigl 'f "ire or the Yluid, which entersthrough t i 't passage ll is exerted upon the valve piu 1e in tiiedirection of openthe -ot in eng gement with the ing of the valve andaccordingly tends toV iorce the int'V ior surtace or' the plug intoengagement nidi tire end 'tace o the stein 15 at the part 15b. 'l iehigh pressure of the incoming iiiiid is elrective upon the plug 11 whenoper vio' the valve and also when closing the sa and maintains the sainein continuous with the opposed con- L L' tiguous end et the stein duringboth the seating and uns .l period "lflie valve plug 14 is thus, a alinies during such periods, under d ect, positive, inechanical control,

oit said L ilic valve ste is preferably provided with an annuil oulder1L-ladapted to en- 'e an anlular seat Ll( at the inner end the'stufliiig boi-:.16 when the valve is fully opened; through theco-operation of a i'lnid tight conoi tiie valve while the latte;-

iiiay be provided eti'ective at the nioiiients ot seating and un- .iievalve is or siiiiple and novel construcitil) between the stiu'iingboi; Y

tion and adapted to control eiiiciently the flow kof fiuids under highpressure and is operated in a simple manner and with al minimum ofeiiort. f

Various changes in the specific form shown and described may be madewithin the scope of the claims without departing from the spirit of myinvention;

I claim: l. A valve'for high pressure systems for the control of theflow of high temperature Auidstherein, rcomprising a massive body, a

passage for fluids through the same, a valve seat in the passage, saidpassage and seat being so disposed within the massive body that thestrength of the latter resists deformation and fracture of al body underthe influence ot' high pressure and prevailing thermal conditions, asolid valve plug, a valve stem for the said plug, means to control themovement of said stem and plug toward and from said valve seat, a stunngbox for the valve stem rigidly secured to the massive body, packingmaterial situated within a relatively 'high thermal Zone of the valveand, by reason of said situation, being subject to deterioration onexposure, in the absence of auxiliary cooling influences, to the heattransmitted from the hot fluids passing through the valve, said packingmaterial being positioned between an inner wall of the stuiing box andthe outer wall of the valve stem forming a gas-tight joint against thehigh pressure fluids in the valve, and a passage for cooling fluidwithin the valve stem having an inlet and an outlet to and from theinterior of the valve stem and adapted to convey the cooling fluid pastthe packing material first in one direction and then in the oppositedirection from and to a lower thermal Zone than that affecting thepacking material.

2. A valve for high pressure systems for the control of the flow of hightemperature fluids therein, comprising a massive body, a passage forfluids through the same, a valve seat in the passage,` said passage andseat being so disposed within the massive body Vthat the strength of thelatter resists deformation and fracture of all ,parts of the body underthe influence of high pressure and prevailing thermal conditions', asolid valve plug, a valve stem for the said plug, a connection betweenthe valve stem and plug which provides a loose engagementtherebetween,fmeans to control the movement of said stem and plug towardand from said valve seat, a stuiiing box for the valve stem rigidlysecured to the massive body, packing material situated within arelativelj high thermal zone of the valve and, by rea.- son of saidsituation, being subject to deterioration on exposure, in the absence ofauxiliary cooling influences, to the heat transmitted from the hotfluids passing part-s of the the valve stem at a point thereofintermediate with ,respect to the valve plug on .the one hand :and thepacking material lon the other, said passage being further adapted toconvey the cooling iiuid past the packing material first in onedirection and then in the opposite direction from and to a lower thermalZone than that affecting the packing material.

3. A valve such as described in claim l in which the stuifng'box isprovided with a passage for a circulating cooling medium, said passagebeing located exteriorly of the packing and within eiiective heatabstracting range of the stuffing box surface which conltacts with thepacking.

1l. A valve such as described in claim l in which the stuffing box isprovided with a spiral passage for a circulating cooling medium, saidpassage being located exteriorly of the packing and within effectiveheat abstracting range of the stuffing box surface which contacts withvthe packing.v f 5. A valve such as `described in claim l, in which thepassage for cooling fluid in the valve stem comprises a longitudinaltube located in a hollow bore in the Valve stem and extending from apoint ahead of the packing material to a point beyond the packingmaterial and having an opening in said latter region, the periphery ofsaid tube being spaced from the inner walls of the valve stem in theregion of' the packing material, whereby the cooling fluid first travelsin the direction of the longitudinal extent of the packing material andthen, via the opening of the tube, flows in a reverse direction to theoutlet.k

6. A valve for high pressure systems for the control of the flow of hightemperature Huids therein, comprising a massive body, a passage forfluids through the same, a valve seat in the passage, said passage andseat being so disposed within the massive body that the strength of thelatter resists deformation and fracture of' all parts of the body underthe influence of high pressure and prevailing thermal conditions, asolid valve plug, a valve stem for the said plug, means for effectingmovement of the valve stem and its associated valve plug by poweroperated control and also by means independent of the power -control andoperable by a manually'controlled member, said member being located in arelatively cool zone with respect to the valve body, a stung box for thevalve stein rigidly secured to the massive body, packing` materialsituated within a relatively high thermal zone of the Valve and, byreason of said situation, being subject to deterioration on exposure, inthe absence of auxiliary cooling` influences7 to the heat transmittedfrom the hot iuids passing through the valve, said packing mate rialbeingpositioned between an inner wall of the stuiiing` box and the cuterwall of the Valve stein forming a gas-tight joint against the highpressure iuids in the Valve, and a passage for cooling fluid within thevalve stein having an inlet and an outlet to and from the interior ofthe Valve stem and adapted to convey the cooling` Huid past thepacking`material lirst in one direction and then in the opposite direction fromand to a lower thermal zone than that affecting the packing material.

In testimony whereof I have hereunto set my hand.

WALTERVH. KNISKERN.

